A 5 GHz, 192.6 dBc/Hz/mW FOM, LC-VCO system with amplitude control loop and LDO voltage regulator in 0.18 mu m CMOS

作者：Lin Tsung Hsien^*; Hsu Ruei Lin; Li Cheng Lung; Tseng Ying Che

来源：IEEE Microwave and Wireless Components Letters, 2007, 17(10): 730-732.

DOI：10.1109/LMWC.2007.905636

• amplitude control loop (ACL)
• phase noise
• voltage-controlled oscillator (VCO)
• voltage regulator

To reduce phase noise degradation from oscillator tail current sources, this letter presents an inductor-capacitor voltage-controlled oscillator (LC-VCO) biased by triode metaloxide-semiconductor transistors. The VCO system also includes an amplitude control loop and a voltage regulator to endure process, voltage, and temperature variations and to enhance power supply rejection ratio. Fabricated in a 0.18 mu m CMOS process, the measured results show the adopted topology achieves a better phase noise than the conventional saturation current source. At 5.181 GHz, the VCO system demonstrates a phase noise of - 104.8 dBc/Hz at 100-kHz offset, and - 127.1 dBc/Hz at 1 MHz offset, while dissipating 4.2 mA from a 1.8 V supply voltage. The corresponding figures of merit at 100 kHz and 1 MHz offset are 190.3 and 192.6 dBc/Hz/mW, respectively.

• 出版日期2007-10
• 单位中国科学院电工研究所